I have written the macro (my first!) as below

Function FindOldNominal(NomCode)

FindOldNominal = WorksheetFunction.VLookup(NomCode, range("IMPORTRANGE"), 5,
false)
End Function




This works fine... except..


If I alter the value in the defined range "ImportRange" say from 10 to 20
at nomcode X then

FindOldNominal(X) still says 10, unless I go into the cell where the
formula call of '=FindOldNominal(X)' is and press enter again.

My question is I would like it to update it self automatically like the sum
function "=sum" does. Is there a reason why this macro isn't or are all
macros like this.
Is there a way round it if this is the case.


Many thanks in anticipation

James